--- product_id: 372302199 title: "4\" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans" brand: "ac infinity" price: "€ 50.81" currency: EUR in_stock: true reviews_count: 6 url: https://www.desertcart.at/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring store_origin: AT region: Austria --- # Spring-loaded aluminum blades for effortless airflow Rubber gaskets ensure airtight seal Galvanized steel body for durability 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans **Brand:** ac infinity **Price:** € 50.81 **Availability:** ✅ In Stock ## Summary > 🔧 Stop drafts, start saving — the smart airflow upgrade your home deserves! ## Quick Answers - **What is this?** 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans by ac infinity - **How much does it cost?** € 50.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Heavy-Duty Durability:** Galvanized steel construction built to last through years of HVAC use - • **Versatile Installation:** Mounts horizontally or vertically to fit any ducting setup seamlessly - • **Airtight Seal Technology:** Dual rubber gasket rings create a secure, draft-proof connection every time - • **Multi-Use HVAC Essential:** Perfect for range hoods, bathroom fans, dryers, and even grow tents - • **Effortless Airflow Control:** Spring-loaded aluminum blades open with minimal airflow, maximizing efficiency ## Overview The AC Infinity 4" Backdraft Damper is a premium HVAC accessory designed to prevent backflow and debris intrusion in 4-inch duct systems. Featuring a galvanized steel body, spring-loaded aluminum blades, and dual rubber gaskets, it ensures airtight sealing and smooth one-way airflow. Ideal for range hoods, bathroom fans, and other ventilation applications, this durable damper enhances system efficiency while protecting your home environment. ## Description An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Mounts horizontally or vertically to prevent backflow and debris from entering ducting. Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. Fit for 4 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat Product Description A ventilation ducting tool designed for insertion into 4” ducting to prevent cold drafts and debris from flowing into ventilation systems. Built to be embedded in ducts, the backdraft damper is made of sturdy galvanized steel and features two rings of outer rubber gaskets. This enables it to grip your ducting with an airtight seal in either a horizontal or vertical orientation. The butterfly damper blades are made of aluminum and are equipped with a light spring that folds with minimal airflow. Applications The spring-loaded antidraft damper is built for heavy-duty performance in applications like overhead range hoods in kitchens, bathroom fans and tumble dryers. It can be fully or partially inserted into your duct work using the rubber rings to hold itself in place. Other one-way airflow uses include keep pilot lights burning in water heaters and keeping debris from entering inline duct fans in grow tents. Product Identification Manufacturer AC Infinity Inc. Product Name Backdraft Damper, 4" Product Model AC-BDD4-B UPC Code 819137021303 Product and Mounting Dimensions Duct Opening Size 4" Product Length 5.03 in. (12.8 cm) Product Performance and Technical Specs Whole Body Material Steel Shutter Material Aluminum Color Black Finish Powder Coat ## Features - An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. - Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. - Mounts horizontally or vertically to prevent backflow and debris from entering ducting. - Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. - Fit for 4 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0842XSTV9 | | Best Sellers Rank | #13 in Heating & Cooling Ducting Products | | Date First Available | 25 March 2020 | | Item Model Number | AC-BDD4-B | | Manufacturer | AC Infinity | | Product Dimensions | 12.7 x 9.68 x 9.68 cm; 299 g | ## Product Details - **Brand:** AC Infinity - **Colour:** Black - **Item dimensions L x W x H:** 12.7 x 9.7 x 9.7 centimeters - **Material:** Alloy Steel, Aluminum - **Size:** 4 Inch ## Images ![4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - Image 1](https://m.media-amazon.com/images/I/51lALiYTYEL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing product *by on Reviewed in the United Arab Emirates 15 August 2025* Amazing ### ⭐ Nicht mal eine Anschlagsdämpfung *by on Reviewed in Germany 21 December 2025* Das größte Außenmaß ist 206mm nicht 200mm. Die Klappen schlagen hart an und sind ungedämpft.Schöne Optik, aber mehr sicher nicht ### ⭐⭐⭐⭐⭐ Highly recommend Great Quality item *by on Reviewed in Canada 8 March 2025* This company puts out "quality" items Something we dont see to often anymore. This item works great when exhaust fan turns on and closes nicely when fan is off. I like the rubber gasket Keeps cold air from coming back into house BigBox stores carry similar item BUT not as well made and more money Highly recommend ## Frequently Bought Together - AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring](https://www.desertcart.at/products/372302199-4-backdraft-damper-one-way-airflow-ducting-insert-with-spring) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-09-09*